Unable to install amp due to configured Http Client

OS Name/Version: Ubuntu 24.04.3 LTS

Product Name/Version: Install Amp v2.6.3

Problem Description: After I press enter to start the installation of AMP, it gives me an error message saying: [Error/9] [0] (TaskCanceledException) : The request was canceled due to the configured HttpClient.Timeout of 30 seconds elapsing.

Installing AMP...
amp already exists. Skipping...
Updating System...
Installing prerequisites...
Installing Java for Minecraft...
Installing 32-bit dependencies for srcds...
AMP instance manager already installed. Skipping...
Adding firewall rules...
Adding firewall rule for port 8080 (AMP Management Instance) via ufw...
Skipping adding existing rule
Skipping adding existing rule (v6)
Creating default instance...
[Info/1] AMP Instance Manager v2.6.3 built 26/09/2025 12:11
[Info/1] Stream: Mainline / Release - built by CUBECODERS/buildbot on CCL-DEV
[Activity/1] Audit: Unknown/None [CreateInstance] Creating instance ADS01 using ADS module on port 8080.
[Error/9] TaskCanceledException
[Error/9] [0] (TaskCanceledException) : The request was canceled due to the configured HttpClient.Timeout of 30 seconds elapsing.
[Error/9]    at Net.Http.HttpClient.HandleFailure(Exception e, Boolean telemetryStarted, HttpResponseMessage response, CancellationTokenSource cts, CancellationToken cancellationToken, CancellationTokenSource pendingRequestsCts)
   at Net.Http.HttpClient.GetStringAsyncCore(HttpRequestMessage request, CancellationToken cancellationToken)
   at ModuleShared.VersionManifest.FetchAsync(String forPlatform)
[Error/9] TimeoutException
[Error/9] [1] (TimeoutException) : A task was canceled.
[Error/9] TaskCanceledException
[Error/9] [2] (TaskCanceledException) : A task was canceled.
[Error/9]    at Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
   at Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at Net.Http.HttpClient.GetStringAsyncCore(HttpRequestMessage request, CancellationToken cancellationToken)
[Error/7] TaskCanceledException
[Error/7] [0] (TaskCanceledException) : The request was canceled due to the configured HttpClient.Timeout of 30 seconds elapsing.
[Error/7]    at Net.Http.HttpClient.HandleFailure(Exception e, Boolean telemetryStarted, HttpResponseMessage response, CancellationTokenSource cts, CancellationToken cancellationToken, CancellationTokenSource pendingRequestsCts)
   at Net.Http.HttpClient.GetStringAsyncCore(HttpRequestMessage request, CancellationToken cancellationToken)
   at ModuleShared.VersionManifest.FetchAsync(String forPlatform)
[Error/7] TimeoutException
[Error/7] [1] (TimeoutException) : A task was canceled.
[Error/7] TaskCanceledException
[Error/7] [2] (TaskCanceledException) : A task was canceled.
[Error/7]    at Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
   at Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at Net.Http.HttpClient.GetStringAsyncCore(HttpRequestMessage request, CancellationToken cancellationToken)
[Info/7] Instance creation failed. Reason: "The core archive failed to download or unpack: Failed to find a release matching the specified version: Mainline/ - This version may no longer be available to download, you should update to a newer version."
Failed to create default instance.
Aborting...

Steps to reproduce:

  • Paste command from AMP website
  • create username and password
  • select what AMP needs to install
  • say no to enabling HTTPS

Actions taken to resolve so far:

N/A

Show exactly what command you are running

A failure like this is often caused by a bad IPv6 setup

bash <(curl -fsSL getamp.sh) is the command I input

Run instead:

bash <(wget -qO- getamp.sh)

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